Sulfur + Oxygen Compounds (S + O)
Browse all compounds containing Sulfur + Oxygen by molecular formula, IUPAC name, or traditional name. Explore molecular weights and compound details.
| CID | Formula | IUPAC Name | Traditional Name | Mol. Weight |
|---|---|---|---|---|
| 6578845 | C30H25Cl2N3OS | (8S,13Z)-8-(4-chlorophenyl)-13-[(4-chlorophenyl)methylene]-6-(4-methoxyphenyl)-11-methyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-8-(4-chlorophenyl)-13-[(4-chlorophenyl)methylene]-6-(4-methoxyphenyl)-11-methyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 546.5 |
| 6578846 | C21H28ClN5O2S | tert-butyl N-[(1R)-1-[6-(4-chloro-3-methyl-phenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-3-methyl-butyl]carbamate | tert-butyl N-[(1R)-1-[6-(4-chloro-3-methyl-phenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-3-methyl-butyl]carbamate | 450.0 |
| 6578854 | C23H22N4O5S | ethyl 4-[[(3S,4S)-6-(2-amino-2-oxo-ethyl)sulfanyl-5-cyano-4-(2-furyl)-2-methylene-3,4-dihydro-1H-pyridine-3-carbonyl]amino]benzoate | ethyl 4-[[(3S,4S)-6-(2-amino-2-oxo-ethyl)sulfanyl-5-cyano-4-(2-furyl)-2-methylene-3,4-dihydro-1H-pyridine-3-carbonyl]amino]benzoate | 466.5 |
| 6578856 | C31H29FN3O2S+ | (8S,13Z)-6-(4-fluorophenyl)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-4-thia-2,7-diaza-11-azoniatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-6-(4-fluorophenyl)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-4-thia-2,7-diaza-11-azoniatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 526.6 |
| 6578857 | C31H28FN3O2S | (8S,13Z)-6-(4-fluorophenyl)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-6-(4-fluorophenyl)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 525.6 |
| 6578858 | C31H22ClN2O3S+ | (1R,2S,3R,10bS)-2-(2-chlorobenzoyl)-3-(thiophene-2-carbonyl)spiro[2,3,4,10b-tetrahydropyrrolo[2,1-a]isoquinolin-4-ium-1,3'-indoline]-2'-one | (1R,2S,3R,10bS)-2-(2-chlorobenzoyl)-3-(thiophene-2-carbonyl)spiro[2,3,4,10b-tetrahydropyrrolo[2,1-a]isoquinolin-4-ium-1,3'-indoline]-2'-one | 538.0 |
| 6578859 | C31H21ClN2O3S | (1R,2S,3R,10bS)-2-(2-chlorobenzoyl)-3-(thiophene-2-carbonyl)spiro[3,10b-dihydro-2H-pyrrolo[2,1-a]isoquinoline-1,3'-indoline]-2'-one | (1R,2S,3R,10bS)-2-(2-chlorobenzoyl)-3-(thiophene-2-carbonyl)spiro[3,10b-dihydro-2H-pyrrolo[2,1-a]isoquinoline-1,3'-indoline]-2'-one | 537.0 |
| 6578862 | C30H26F2N3OS+ | (8S,13Z)-8-(4-fluorophenyl)-13-[(4-fluorophenyl)methylene]-6-(4-methoxyphenyl)-11-methyl-4-thia-2,7-diaza-11-azoniatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-8-(4-fluorophenyl)-13-[(4-fluorophenyl)methylene]-6-(4-methoxyphenyl)-11-methyl-4-thia-2,7-diaza-11-azoniatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 514.6 |
| 6578863 | C30H25F2N3OS | (8S,13Z)-8-(4-fluorophenyl)-13-[(4-fluorophenyl)methylene]-6-(4-methoxyphenyl)-11-methyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-8-(4-fluorophenyl)-13-[(4-fluorophenyl)methylene]-6-(4-methoxyphenyl)-11-methyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 513.6 |
| 6578866 | C21H21N3O3S | (E)-3-(4-methoxyphenyl)-N-[[[(1S,2S)-2-phenylcyclopropanecarbonyl]amino]carbamothioyl]prop-2-enamide | (E)-3-(4-methoxyphenyl)-N-(2-((1S,2S)-2-phenylcyclopropanecarbonyl)hydrazinecarbonothioyl)acrylamide | 395.5 |
| 6578883 | C24H29N2O5S+ | (4R,5R)-1-(2-morpholin-4-ium-4-ylethyl)-4-(4-propoxybenzoyl)-5-(2-thienyl)pyrrolidine-2,3-dione | (4R,5R)-1-(2-morpholin-4-ium-4-ylethyl)-4-(4-propoxybenzoyl)-5-(2-thienyl)pyrrolidine-2,3-dione | 457.6 |
| 6578884 | C24H28N2O5S | (4R,5R)-1-(2-morpholinoethyl)-4-(4-propoxybenzoyl)-5-(2-thienyl)pyrrolidine-2,3-dione | (4R,5R)-1-(2-morpholinoethyl)-4-(4-propoxybenzoyl)-5-(2-thienyl)pyrrolidine-2,3-dione | 456.6 |
| 6578893 | C31H30N3O2S+ | (8S,13Z)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-6-phenyl-4-thia-2,7-diaza-11-azoniatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-6-phenyl-4-thia-2,7-diaza-11-azoniatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 508.7 |
| 6578894 | C31H29N3O2S | (8S,13Z)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-6-phenyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | (8S,13Z)-8-(4-methoxyphenyl)-13-[(4-methoxyphenyl)methylene]-11-methyl-6-phenyl-4-thia-2,7,11-triazatricyclo[7.4.0.03,7]trideca-1(9),2,5-triene | 507.6 |
| 6578895 | C20H21N3O4S | 2,6-dimethoxy-N-[[[(1S,2S)-2-phenylcyclopropanecarbonyl]amino]carbamothioyl]benzamide | MLS000769146 | 399.5 |
| 6578904 | C32H26FN3OS | (6S,6aS,9S)-6-(4-fluorophenyl)-7-oxo-N,9-diphenyl-6a,8,9,10-tetrahydro-6H-benzo[b][1,4]benzodiazepine-5-carbothioamide | (6S,6aS,9S)-6-(4-fluorophenyl)-7-oxo-N,9-diphenyl-6a,8,9,10-tetrahydro-6H-benzo[b][1,4]benzodiazepine-5-carbothioamide | 519.6 |
| 6578905 | C20H21N3O4S | 3,5-dimethoxy-N-[[[(1S,2S)-2-phenylcyclopropanecarbonyl]amino]carbamothioyl]benzamide | MLS000769145 | 399.5 |
| 6578908 | C19H20N5OS+ | [(1R)-1-[6-(3-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-2-phenyl-ethyl]ammonium | [(1R)-1-[6-(3-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-2-phenyl-ethyl]ammonium | 366.5 |
| 6578909 | C19H19N5OS | (1R)-1-[6-(3-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-2-phenyl-ethanamine | (1R)-1-[6-(3-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-2-phenyl-ethanamine | 365.5 |
| 6578924 | C15H20N5OS2+ | [(1R)-1-[6-(4-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-3-methylsulfanyl-propyl]ammonium | [(1R)-1-[6-(4-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-3-methylsulfanyl-propyl]ammonium | 350.5 |
| 6578925 | C15H19N5OS2 | (1R)-1-[6-(4-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-3-methylsulfanyl-propan-1-amine | (1R)-1-[6-(4-methoxyphenyl)-5H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]-3-methylsulfanyl-propan-1-amine | 349.5 |
| 6578930 | C20H27N5O2S2 | tert-butyl N-[(1R)-2-methyl-1-[6-(o-tolylmethylsulfanyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]propyl]carbamate | tert-butyl N-[(1R)-2-methyl-1-[6-(o-tolylmethylsulfanyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]propyl]carbamate | 433.6 |
| 6578943 | C28H23ClN2O2S | allyl (3S,4S)-4-(2-chlorophenyl)-5-cyano-2-methylene-6-(1-naphthylmethylsulfanyl)-3,4-dihydro-1H-pyridine-3-carboxylate | allyl (3S,4S)-4-(2-chlorophenyl)-5-cyano-2-methylene-6-(1-naphthylmethylsulfanyl)-3,4-dihydro-1H-pyridine-3-carboxylate | 487.0 |
| 6578947 | C20H17N5O4S | (8aR,9R)-9-(2-furyl)-2-[(4-nitrophenyl)methylsulfanyl]-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | (8aR,9R)-9-(2-furyl)-2-[(4-nitrophenyl)methylsulfanyl]-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | 423.4 |
| 6578948 | C14H20N7O2S2+ | [(1S,2R)-2-methyl-1-[6-[(6-methyl-2,4-dioxo-1H-pyrimidin-5-yl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]butyl]ammonium | [(1S,2R)-2-methyl-1-[6-[(6-methyl-2,4-dioxo-1H-pyrimidin-5-yl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]butyl]ammonium | 382.5 |
| 6578953 | C28H26N4OS | (8aR,9R)-9-(4-ethylphenyl)-2-(1-naphthylmethylsulfanyl)-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | (8aR,9R)-9-(4-ethylphenyl)-2-(1-naphthylmethylsulfanyl)-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | 466.6 |
| 6578958 | C23H22N4O2S | (8aR,9R)-2-benzylsulfanyl-9-(3-methoxyphenyl)-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | (8aR,9R)-2-benzylsulfanyl-9-(3-methoxyphenyl)-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | 418.5 |
| 6578965 | C20H20Cl2N2OS3 | (12S)-3-[(2,4-dichlorophenyl)methylsulfanyl]-12-ethyl-12-methyl-5-methylsulfanyl-11-oxa-8-thia-4,6-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5-tetraene | (12S)-3-[(2,4-dichlorophenyl)methylsulfanyl]-12-ethyl-12-methyl-5-methylsulfanyl-11-oxa-8-thia-4,6-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5-tetraene | 471.5 |
| 6578968 | C15H19N3O2S3 | 2-[[(12S)-12-ethyl-12-methyl-5-methylsulfanyl-11-oxa-8-thia-4,6-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5-tetraen-3-yl]sulfanyl]acetamide | 2-[[(12S)-12-ethyl-12-methyl-5-methylsulfanyl-11-oxa-8-thia-4,6-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5-tetraen-3-yl]sulfanyl]acetamide | 369.5 |
| 6578970 | C20H14F3N5O2S | N'-[1-[(4S)-1-(1,3-benzothiazol-2-yl)-5-oxo-3-(trifluoromethyl)-4H-pyrazol-4-yl]vinyl]benzohydrazide | N'-[1-[(4S)-1-(1,3-benzothiazol-2-yl)-5-oxo-3-(trifluoromethyl)-4H-pyrazol-4-yl]vinyl]benzohydrazide | 445.4 |
| 6578979 | C24H21Cl2N3O3S | ethyl 2-[[(3S,4R)-4-(2-chlorophenyl)-3-[(4-chlorophenyl)carbamoyl]-5-cyano-2-methylene-3,4-dihydro-1H-pyridin-6-yl]sulfanyl]acetate | ethyl 2-[[(3S,4R)-4-(2-chlorophenyl)-3-[(4-chlorophenyl)carbamoyl]-5-cyano-2-methylene-3,4-dihydro-1H-pyridin-6-yl]sulfanyl]acetate | 502.4 |
| 6578990 | C27H30N4OS | (8aR,9R)-2-benzylsulfanyl-9-(4-isopropylphenyl)-6,6-dimethyl-1,7,8a,9-tetrahydro-[1,2,4]triazolo[5,1-b]quinazolin-8-one | (8aR,9R)-2-benzylsulfanyl-9-(4-isopropylphenyl)-6,6-dimethyl-1,7,8a,9-tetrahydro-[1,2,4]triazolo[5,1-b]quinazolin-8-one | 458.6 |
| 6578994 | C27H30N4O4S2 | 6-[(2S,6R)-2,6-dimethylmorpholin-4-yl]-5-[(Z)-[3-[2-(4-methoxyphenyl)ethyl]-4-oxo-2-thioxo-thiazolidin-5-ylidene]methyl]-1,4-dimethyl-2-oxo-pyridine-3-carbonitrile | 6-[(2S,6R)-2,6-dimethylmorpholin-4-yl]-5-[(Z)-[3-[2-(4-methoxyphenyl)ethyl]-4-oxo-2-thioxo-thiazolidin-5-ylidene]methyl]-1,4-dimethyl-2-oxo-pyridine-3-carbonitrile | 538.7 |
| 6578997 | C18H20N4O3S | (8aR,9R)-9-(3-ethoxy-4-hydroxy-phenyl)-2-methylsulfanyl-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | (8aR,9R)-9-(3-ethoxy-4-hydroxy-phenyl)-2-methylsulfanyl-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | 372.4 |
| 6578998 | C24H24N3O4S- | 2-[(1S)-2-(methylamino)-1-(phenylcarbamoyl)allyl]-4-(p-tolylsulfonylamino)phenolate | 2-[(1S)-2-(methylamino)-1-(phenylcarbamoyl)allyl]-4-(p-tolylsulfonylamino)phenolate | 450.5 |
| 6578999 | C24H25N3O4S | (2S)-2-[2-hydroxy-5-(p-tolylsulfonylamino)phenyl]-3-(methylamino)-N-phenyl-but-3-enamide | (2S)-2-[2-hydroxy-5-(p-tolylsulfonylamino)phenyl]-3-(methylamino)-N-phenyl-but-3-enamide | 451.5 |
| 6579002 | C25H20N2O6S | (4R,5R)-5-(3-allyloxyphenyl)-4-(2,3-dihydro-1,4-benzodioxine-6-carbonyl)-1-thiazol-2-yl-pyrrolidine-2,3-dione | (4R,5R)-5-(3-allyloxyphenyl)-4-(2,3-dihydro-1,4-benzodioxine-6-carbonyl)-1-thiazol-2-yl-pyrrolidine-2,3-dione | 476.5 |
| 6579005 | C21H29N5O2S2 | tert-butyl N-[(1S,2R)-2-methyl-1-[6-(o-tolylmethylsulfanyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]butyl]carbamate | tert-butyl N-[(1S,2R)-2-methyl-1-[6-(o-tolylmethylsulfanyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]butyl]carbamate | 447.6 |
| 6579008 | C26H25ClN2O4S | (4R,4aR)-2-[(2-chlorophenyl)methylsulfanyl]-5-oxo-4-(3,4,5-trimethoxyphenyl)-4,4a,6,7-tetrahydro-1H-quinoline-3-carbonitrile | (4R,4aR)-2-[(2-chlorophenyl)methylsulfanyl]-5-oxo-4-(3,4,5-trimethoxyphenyl)-4,4a,6,7-tetrahydro-1H-quinoline-3-carbonitrile | 497.0 |
| 6579017 | C14H6Cl2NO5S2- | (1S,10S,11S)-4,6-dichloro-9,15-dioxo-8-oxa-12,16-dithia-14-azatetracyclo[8.7.0.02,7.013,17]heptadeca-2(7),3,5,13(17)-tetraene-11-carboxylate | (1S,10S,11S)-4,6-dichloro-9,15-dioxo-8-oxa-12,16-dithia-14-azatetracyclo[8.7.0.02,7.013,17]heptadeca-2(7),3,5,13(17)-tetraene-11-carboxylate | 403.2 |
| 6579018 | C14H7Cl2NO5S2 | (1S,10S,11S)-4,6-dichloro-9,15-dioxo-8-oxa-12,16-dithia-14-azatetracyclo[8.7.0.02,7.013,17]heptadeca-2(7),3,5,13(17)-tetraene-11-carboxylic acid | (1S,10S,11S)-4,6-dichloro-9,15-dioxo-8-oxa-12,16-dithia-14-azatetracyclo[8.7.0.02,7.013,17]heptadeca-2(7),3,5,13(17)-tetraene-11-carboxylic acid | 404.2 |
| 6579021 | C17H18N4OS2 | (8aR,9R)-2-methylsulfanyl-9-(4-methylsulfanylphenyl)-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | (8aR,9R)-2-methylsulfanyl-9-(4-methylsulfanylphenyl)-6,7,8a,9-tetrahydro-1H-[1,2,4]triazolo[5,1-b]quinazolin-8-one | 358.5 |
| 6579022 | C29H24N2O5S | (4R,5R)-5-(3-methoxyphenyl)-4-[4-(m-tolylmethoxy)benzoyl]-1-thiazol-2-yl-pyrrolidine-2,3-dione | (4R,5R)-5-(3-methoxyphenyl)-4-[4-(m-tolylmethoxy)benzoyl]-1-thiazol-2-yl-pyrrolidine-2,3-dione | 512.6 |
| 6579023 | C29H24N2O5S | (4E,5S)-4-[hydroxy-[4-(m-tolylmethoxy)phenyl]methylene]-5-(3-methoxyphenyl)-1-thiazol-2-yl-pyrrolidine-2,3-dione | (4E,5S)-4-[hydroxy-[4-(m-tolylmethoxy)phenyl]methylene]-5-(3-methoxyphenyl)-1-thiazol-2-yl-pyrrolidine-2,3-dione | 512.6 |
| 6579037 | C22H23NOS | (6R,6aR)-9,9-dimethyl-6-(p-tolyl)-6,6a,8,11-tetrahydrobenzo[c][1,5]benzothiazepin-7-one | (6R,6aR)-9,9-dimethyl-6-(p-tolyl)-6,6a,8,11-tetrahydrobenzo[c][1,5]benzothiazepin-7-one | 349.5 |
| 6579045 | C25H21N3O3S | N-(3-cyano-4,5,6,7-tetrahydrobenzothiophen-2-yl)-4-[(1R,2S,6S,7S)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]benzamide | N-(3-cyano-4,5,6,7-tetrahydrobenzothiophen-2-yl)-4-[(1R,2S,6S,7S)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]benzamide | 443.5 |
| 6579053 | C19H20N5OS2+ | [(1R)-1-[6-[(3-methoxyphenyl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]-2-phenyl-ethyl]ammonium | [(1R)-1-[6-[(3-methoxyphenyl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]-2-phenyl-ethyl]ammonium | 398.5 |
| 6579054 | C19H19N5OS2 | (1R)-1-[6-[(3-methoxyphenyl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]-2-phenyl-ethanamine | (1R)-1-[6-[(3-methoxyphenyl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]-2-phenyl-ethanamine | 397.5 |
| 6579060 | C7H11NO2S2 | (3R,5R)-1,7-dithia-4-azoniaspiro[4.4]nonane-3-carboxylate | (3R,5R)-1,7-dithia-4-azoniaspiro[4.4]nonane-3-carboxylate | 205.3 |
| 6579062 | C20H25Cl2N5O2S2 | tert-butyl N-[(1S,2R)-1-[6-[(2,6-dichlorophenyl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]-2-methyl-butyl]carbamate | tert-butyl N-[(1S,2R)-1-[6-[(2,6-dichlorophenyl)methylsulfanyl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-3-yl]-2-methyl-butyl]carbamate | 502.5 |
Related Element Combinations
Explore other compound combinations that include similar elements. Discover more chemistry by browsing related searches.
Looking for a specific combination?
Select any elements from the periodic table and discover all known compounds instantly.
Data Sourced from PubChem
All compound data on CompoundLookup comes from PubChem, the world's largest free chemistry database maintained by the National Institutes of Health (NIH). We've indexed and organized this data to enable element-based searching - a feature not available on any other platform. We're constantly adding more compounds and improving our coverage. Learn more about our mission.